Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface, showing a first embodiment of the new design;

FIG. 2 is a second embodiment thereof;

FIG. 3 is a third embodiment thereof; and,

FIG. 4 is a fourth embodiment thereof.

The broken line showing of a display screen and watch in all views are for the purpose of illustrating portions of the article and environmental structure and form no part of the claimed design. The broken line showing of text, numbers, icons, and boxes are included for the purpose of illustrating portions of the article and form no part of the claimed design. The diagonal lines in all views depict a contrast in appearance. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 